I currently have an external hardrive connected to my time capsule. On this external HD I have all my music and movies stored. I use my MacBook Pro to access these remotely via the wireless network. This enables me to access my movies and music without having to clog up my MBP hard drive with these large files. I am however concerned with loosing my music and movies if I have an external HD failure. I would like to sync this external HD with another ext HD. Does anybody know of a good simple syncing software that will ensure that when I add a movie or album to one ext hd, it is synced to another ext HD? This does not have to be automatic, it can work on frequency/time basis. Microsoft have SyncToy which I understand performs this function. Do we have something similar for the Mac OS?